This paper discusses the development of a rapid, large-scale integration of deterministic dopant placement technique for encoding information in physical structures at the nanoscale. The doped structures bestow a customizable radiofrequency (RF) electronic signature, which could be leveraged into a distinctive identification tag. This will allow any manufactured item (integrated circuit, pharmaceutical, etc.) to be uniquely authenticatable. Applications of this technology include enabling a secure Internet of Things (IoT) and eliminating counterfeit products.